﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using Shcool.Models;

namespace Shcool.Controllers
{
    public class AccountController : Controller
    {

        //
        // GET: /Account/LogOn

        public ActionResult LogOn ( )
        {
            return View ( );
        }

        //
        // POST: /Account/LogOn

        [HttpPost]
        public ActionResult LogOn ( LogOnModel model , string returnUrl )
        {
            if ( ModelState.IsValid )
            {
                if ( Membership.ValidateUser ( model.UserName , model.Password ) )
                {
                    FormsAuthentication.SetAuthCookie ( model.UserName , model.RememberMe );
                    if ( Url.IsLocalUrl ( returnUrl ) && returnUrl.Length > 1 && returnUrl.StartsWith ( "/" )
                        && !returnUrl.StartsWith ( "//" ) && !returnUrl.StartsWith ( "/\\" ) )
                    {
                        return Redirect ( returnUrl );
                    }
                    else
                    {
                        return RedirectToAction ( "Navigation" , "Home" );
                    }
                }
                else
                {
                    ModelState.AddModelError ( "" , "The user name or password provided is incorrect." );
                }
            }

            // If we got this far, something failed, redisplay form
            return View ( model );
        }

        //
        // GET: /Account/LogOff

        public ActionResult LogOff ( )
        {
            FormsAuthentication.SignOut ( );

            return RedirectToAction ( "Index" , "Home" );
        }

        //
        // GET: /Account/Register

        public ActionResult Register ( )
        {
            return View ( );
        }

        //
        // POST: /Account/Register

        [HttpPost]
        public ActionResult Register ( RegisterModel model )
        {
            if ( ModelState.IsValid )
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus;
                Membership.CreateUser ( model.UserName , model.Password , model.Email , null , null , true , null , out createStatus );

                if ( createStatus == MembershipCreateStatus.Success )
                {
                    FormsAuthentication.SetAuthCookie ( model.UserName , false /* createPersistentCookie */);
                    return RedirectToAction ( "Navigation" , "Home" );
                }
                else
                {
                    ModelState.AddModelError ( "" , ErrorCodeToString ( createStatus ) );
                }
            }

            // If we got this far, something failed, redisplay form
            return View ( model );
        }

        //
        // GET: /Account/ChangePassword

        [Authorize]
        public ActionResult ChangePassword ( )
        {
            return View ( );
        }

        //
        // POST: /Account/ChangePassword

        [Authorize]
        [HttpPost]
        public ActionResult ChangePassword ( ChangePasswordModel model )
        {
            if ( ModelState.IsValid )
            {

                // ChangePassword will throw an exception rather
                // than return false in certain failure scenarios.
                bool changePasswordSucceeded;
                try
                {
                    MembershipUser currentUser = Membership.GetUser ( User.Identity.Name , true /* userIsOnline */);
                    changePasswordSucceeded = currentUser.ChangePassword ( model.OldPassword , model.NewPassword );
                }
                catch ( Exception )
                {
                    changePasswordSucceeded = false;
                }

                if ( changePasswordSucceeded )
                {
                    return RedirectToAction ( "ChangePasswordSuccess" );
                }
                else
                {
                    ModelState.AddModelError ( "" , "The current password is incorrect or the new password is invalid." );
                }
            }

            // If we got this far, something failed, redisplay form
            return View ( model );
        }

        //
        // GET: /Account/ChangePasswordSuccess

        public ActionResult ChangePasswordSuccess ( )
        {
            return View ( );
        }

        #region Status Codes
        private static string ErrorCodeToString ( MembershipCreateStatus createStatus )
        {
            // See http://go.microsoft.com/fwlink/?LinkID=177550 for
            // a full list of status codes.
            switch ( createStatus )
            {
                case MembershipCreateStatus.DuplicateUserName:
                    return "User name already exists. Please enter a different user name.";

                case MembershipCreateStatus.DuplicateEmail:
                    return "A user name for that e-mail address already exists. Please enter a different e-mail address.";

                case MembershipCreateStatus.InvalidPassword:
                    return "The password provided is invalid. Please enter a valid password value.";

                case MembershipCreateStatus.InvalidEmail:
                    return "The e-mail address provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidAnswer:
                    return "The password retrieval answer provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidQuestion:
                    return "The password retrieval question provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidUserName:
                    return "The user name provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.ProviderError:
                    return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                case MembershipCreateStatus.UserRejected:
                    return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                default:
                    return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
            }
        }
        #endregion
    }
}
